Editar o código:
ver o resultado »
Tente você mesmo - ©
w3ii.com
<!DOCTYPE html> <html> <head> <style> div { background-color: red; opacity: 0.5; filter: Alpha(opacity=50); /* IE8 and earlier */ } </style> </head> <body> <div>This element's opacity is 0.5! Note that both the text and the background-color are affected by the opacity level!</div> </body> </html>